High 7.5Published Jun 2, 2023

CVE-2023-25743A lack of in app notification for entering fullscreen mode could have lead to a malicious website spoofing browser chrome.<br>*This bug only affects Firefox Focus.

Updated under an hour ago (Oct 27, 2026, 9:40 PM ET)

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No exploitation reported and no EPSS estimate yet.

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Every CVE for mozilla firefox_focus

Exploited in the last 30 days

A lack of in app notification for entering fullscreen mode could have lead to a malicious website spoofing browser chrome.<br>*This bug only affects Firefox Focus. Other versions of Firefox are unaffected.*. This vulnerability affects Firefox < 110 and Firefox ESR < 102.8.

CVSS: 7.5 HIGH (v3.1, NVD)CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:H/A:N
Weakness (CWE): CWE-290
Known exploited: Not in CISA's KEV catalog
EPSS (exploitation in the next 30 days): Not loaded for this CVE
Assigned by: Not given
NVD analysis: Modified
Record last updated: Oct 24, 2026
First seen by InfoSec Signals: Oct 24, 2026

Affected products

Affected products

mozilla firefox_focus mozilla:firefox_focus	all versions	NVD

References

References

https://bugzilla.mozilla.org/show_bug.cgi?id=1800203	issue-tracking, permissions-required
https://www.mozilla.org/security/advisories/mfsa2023-05/	vendor-advisory
https://www.mozilla.org/security/advisories/mfsa2023-06/	vendor-advisory

The CVE record on cve.org NVD's entry

The CVE record is authoritative. Products marked “from the name” were identified from the CNA's free-text names, not a CPE, and are matched less certainly. This product uses the NVD API but is not endorsed or certified by the NVD.